Lock.



APPLICATION FILED OCT. 4.

Patented N0 2 SHEET S-SHEET ll m i IQ/ k. @W H J. CARLSON.

LOCK.

APPLICATION FILED ocT. II. 19M.

Patented Nov. 30, 191 5 2 SHEETS-SHEET 2.

rarer eerie.

LOCK.

Specification of Letters Patent.

Patented Nov. 30, 1915.

Application filed October 17, 1914.. Serial No. 867,210.

To all whom it may concern:

Be it known that 1, JOHN GARLson, a citizen of the United States, residing at Jersey City, in the county of Hudson and State of New Jersey, have invented new and useful Improvements in Locks, of which the following is a specification.

This invention relates to door locks and it consists in the novel features hereinafter described and claimed.

An object of the invention is to provide within the casing of the look a series of tumblers pivotally mounted and having openings therein for the reception of a stud mounted upon the shank of the lock bolt. The openings in the tumblers are provided at their ends with notches adapted to receive the said stud whereby the lock bolt is held against longitudinal movement when the tumblers are in their lowermost position and a spring pressed pawl is pivotally mounted in the casing of the look and engages the tumblers to hold the same in their lowermost position. A plate is locatedupon the said studs between two of the adjacent tumblers and serves as means for preventing the tumblers from being swung upon their pivotal connection with the casing by a key unless the key is provided with a suitable recess adapted to receive the plate. By removing the plate of one size and substituting therefor a plate of another size the lock may be readily changed in order that a new key may be required for the purpose ofoperating the lock to throw the lock bolt.

In the accompanying drawings :Figure 1 is a side view of the lock with parts in section showing one of the side plates of the lock casing removed. 2 is a similar view showing the latch bolt and lock bolt of the lock projected. Fig. 3 is a similar view showing both of the bolts in retracted position. Figs. 4 and 5 are detailed side elevations of viewsof tumblers used in thelock. Fig. 6 is a detailed side elevation of the lock bolt. Fig. 7 is a detailed side elevation of a plate which may be positioned between the tumblers of the lock.

The lock comprises a casing 1 of usual pattern, provided with an edge plate 2 having an opening 3. The said opening 3 is adapted to receive the latch and lock bolts as Wlll be hereinafter described. The opposite sides of the casing 1 are provided with key openings 4 of usual form.

Knob shaft bearings 5 are j ournaled in the opposite sides of the casing 1 in the usual manner and are provided with lugs 6. The said bearings are further provided with notches 7 which are adapted to receive the end or" a bolt 8 movably mounted in the casing 1. A spring 9 is also mounted in the casing l and bears against the bolt 8 and serves to hold the same in a projected or retracted position. A key bearing 10 is journaled in the casing 1 and is provided with an arm 11 which engages the bolt 8. lVhen a key (not shown) is inserted in the bearing 10 and the said bearing is turned the bolt 8 is moved longitudinally whereby the end thereof may be inserted in the notches 7 and thus the bearings 5 which receive the knob shaft are restrained against turning movement in the casing 1.

A cam member 12 is turnably mounted in the casing 1 and when the lugs 6 are turned about the axis of the bearings 5 they encounter the cam member 12 and swing the same within the casing 1. A spring 13 is located in the casing l and bears at its free end against the end portion of the cam member 12 and serves to maintain the said cam member in a normal position. A latch bolt 14: is movably mounted in the opening 3 of the edge plate Q and the shank 15 of the said bolt is pivotally connected with the lower end of the cam member 12 as best illustrated in Fig. 1 of the drawings. Consequently it will be seen that when the bolt 8 is out of engagement with the notches 7 of the knob shaft bearings 5 the knob shaft may be turned whereby the bearings 5 are partially rotated and inasmuch as the lugs 6 engage the cam member 12 the said cam member 12 is swung so that the shank 15 and bolt it are retracted with relation to the edge plate 2 and for this reason the latch bolts 1% may be withdrawn from a keeper provided at the edge of the door frame.

A look bolt 16 is movably mounted in the opening 3 below the latch bolt 1e and the shank 17 of the said lock bolt is provided with a slot 18 which slidably receives a lug 19 mounted at the inner surface of one side of the casing 1.. A stud 20 is mounted upon the shank 17 of the lock bolt 16 below the slot 18 and the shank 17 is provided at its lower edge with notches 21 between which a key which is inserted in the key opening at of the casing 1 and may be entered by the keys for the purpose of moving the lock bolt 16 longitudinally during the turning move ment of the said key.

Tumblers 22 are pivotally mounted in the casing 1 and the said tumblers are provided with openings 23 having at their ends upwardly disposed notches 24. Some of the tumblers 22 are provided at their upper edges with shoulders 25 while other of the said tumblers 22 are devoid of the said shoulders. A spring pressed pawl 26 is pivotally mounted in the casing 1 and normally engages the shoulders 25 of those tumblers 22 provided with the same and serves to hold the said tumblers against swinging movement upon their pivotal connection with the casing 1.

The stud 20 is normally received in the notches 2 1 at either end of the openings 23 in the tumblers 22 according to the position of the lock bolt 16. When the lock bolt 16 is in a projected position as shown in Fig. 1 of the drawings the said stud receives in the notches 24 at the forward ends of the opening 23 and when the lock bolt 16 is in a retracted position in the casing 1 the said stud 20 is received in the notches 21 at the rear ends of the openings 23 in the tumblers 22. A plate 27 is located upon the stud 20 between two of the adjacent tumblers 23 and the lower edge of the said plate is disposed toward the key opening 1 in the sides of the casing 1.

When a key 28 is inserted in the key opening 4t ofthe casing 1 and the key is turned the said key comes in contact first with those tumblers 22 which are devoid of shoulders and the said tumblers are moved in an upward direction whereby the free end of the pawl 26 is elevated and carried above the shoulders 25 of the other tumblers Upon continuing the turning movement of the key the said key engages those tumblers 22 which are provided with the shoulders and then the edge portion of the key 28 passes along the opposite sides of the plate 27 provided the key is the proper one to manipulate the lock. In the event that the key is not the proper one for operating the lock as soon as the key strikes the plate 27 it can turn no more and therefore the lock bolt 16 cannot be moved from a. projected to a retracted position with relation to the casing 1. If how-' ever, the key 28 is a proper one it receives the lower edge portion of the plate 27 and the tumblers 22 are elevated or turned upon their pivotal connection with the casing 1 whereby the stud 20 is brought into alinement with the intermediate portion of the opening 23 in the said tumblers. Upon continuing the turning movement of the key 28 the said key engages the lug Y21 and the shank 17 and lock bolts 16 are moved in-' direction when the operation hereinbeiore described is reversed.

In Fig. 3 of the drawing the latch bolt 1% and the lock bolt 16 are shown in retracted positions. The latch bolt 16 is moved to this position by the key 28 and the upper portion of the shank 17 of the said lock bolt strikes the lower end of the cam member 12 and swings the same away from the knob shaft bearing 5 and consequently the latch bolt 17 is moved to the retracted position. As soon the key 28 descends below the lower edges of the tumblers 22 and the plates 27 carried thereby the tension of the spring '13 swings the cam member 12 toward the knob shai't bearing 5 whereby the latch bolt 14 is moved to a. projected position withrelation to the latch casing and inasmuch as the lower end of the cam member 12 engages the upper portion of the shank 17 of the latch bolt 16 the said lock bolt 16 is moved to the position shown in Fig. 1 of the drawing and the lug and the stud 20 enter the notches 2 1 of the tumblers 22. Therefore it will be seen that a lock of simple and durable structure is provided, said lock having its parts compactly arranged and also having its latch bolt andlock bolt operating through the same opening at the edge plate of the lock casing thereby requiring only one opening in the keeper for the of the said bolts.

Having describedthe invention what is claimed is 1. A look comprising a casing, a lock bolt movably mounted in the casing and provided with a shank having a stud mounted thereon, means for guiding the movement of the lock bolt with relation to the casing, tumblers pivotally mountedin the casing and having openings provided at their ends with notches, said notches and openings adapted to receive said stud and a plate detachably mounted on the said stud between the adj acent tumblers. r

2. A lock comprising a casing, a lock bolt movably mounted in the casing and vproreception of both I: ceive the stud, a plate detachably mounted 1,162,569 a i e vided With a stud, tumblers pivotally the casing and normally engaging the shoul- 10 mounted in the casing and provided with ders of those tumblers having the same. openings having at their ends notches, said In testimony whereof I afiix my signature notches and said openings adapted to rein presence of two Witnesses.

on the stud between tWo of the adjacent tum- 7 JOHN CARLSON' blers, some of the tumblers having shoulders Witnesses:

V and others being devoid of shoulders, and a JofiN A. DONEGLER,

spring pressed pawl pivotally mounted in GEO. H. BYRNE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G." 

